LAYTON — Police still don’t know what caused a man to veer off the side of Highway 89 and crash into a traffic pole on Saturday.

The single-vehicle crash killed him.

“We still have not made a determination on what caused the accident,” Layton Police Lt. Shawn Horton said on Monday morning.

Charles Black, 75, owner of Black Farms in Syracuse, was killed in the crash that happened on Saturday at 8:50 a.m. on northbound Highway 89 near 750 North.

Black Farms is well-known for its corn mazes and has supported educational tours. Black was also known for his conservation efforts and commented in public meetings that putting the West Davis Corridor through farmland was a bad idea.

In the crash, Black’s Buick sedan reportedly veered to the right on the road just before it hit a traffic pole and burst into flames. Police believe Black was killed on impact. His body was not burned, police said.

“We don’t know if he had a heart attack or something else happened” the lieutenant said. “We just don’t know at this time,”

Police don’t believe alcohol was a factor.

One lane of travel on northbound U.S. 89 was closed for several hours, Horton said. The Layton City Fire Department put out the fire and officers with the Davis County Sheriff’s Office and the Utah Highway Patrol helped with traffic.